Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '371d394ac6fccc15c4a5bfb094bda18b565cdce2359d381afc3bc1d05e651b3f' 
  AND token = 'fo5rdlRDXjz1uEKqZRh7Mg7C04yTNoZVGLf2EqnvOgU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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