Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca2c8a0635455159f2aaacdc55accc9d7bd648d55d0616f9cce6d1ea46c4b27d' 
  AND token = 'zLaxVO0VahyOIkQHELvNF7jpZj0kZ/cmwebtFW4l888=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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