Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7501071331e721e6c5e006b8d50ee4707b7bed70ed8b694bdc727e0df51dfdae' 
  AND token = '34D4HWV3MpjTzQS70JoVzGaKSYJdAx2HfmIL403vaQI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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