Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4db001ccc697d71b4debabed315a6e7b9142392cd9237ae8681d8c0a0883b77' 
  AND token = '4WGSvMyQGhLv+9pU6GYDOhl3//E9sBMn9IhUf/Yaxno=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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