Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f89e87231ec26ef15c182f476e205705ed68f9158104167c40a86a32636a98db' 
  AND token = 'xX5aPA0Nfy2GJRLqjPkHOjfa34D8b+GD+A+o3Q0iKf8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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