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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0af3659526e5297455eac024aa0cb3d4e91f5415152b757bc09ff4d1433ab37e' 
  AND token = 'N/1WGCM3nTdz40doKIZt/KByvqe15q0JXEbFKMeUXZo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}