Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afddb039cb3edc4bb037621eb3d948b791b42d474766e43cdb2076711d4cf9db' 
  AND token = 'mhSlZ0U8iFO8Hpc/lMxvsVTJ57FL3aQLXjQcUzrBDPs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}