Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd15de465c245d5648ce5d8d1ca353e72372a160669915233d0ab588018921a8e' 
  AND token = '4uNy67uK5oYI4xSCakz4yB12G1R556GHCgLtOc/VydQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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