Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71ad37f27e48814bad4e427820928fd5d884a0b8cca3cddd159bb423c81a33cd' 
  AND token = 'h9rseNvzGrCJ7oPhCSl6nJO3tbkedHkZ1atoVw2IjPg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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