Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '972074245421ac1dec382a04298417c83c3399aa084a935902bc75bbb5ceb5c0' 
  AND token = 'vBxvANVO2g5vGcthEuEx1SIFrWnS/8PhVVmrv6g157w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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