Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d74ef9bbda1531d6bdf0225757a13598b13f7e99b1cfd45189f3de48b8dd04c' 
  AND token = '0yaURoZCQXQyXZlR627nqeRVy2YvY+tZT9z5Sl1t+K8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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