Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8e096c758f0550e9faa8376e4f315398a15c0a1c6114949216285f1dc475e1d' 
  AND token = '+JlPgPfa1MbcM9q/hQwoqoG2336xI1f+9Dpt+oSNpBg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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