Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a678e7f8b3fa2298425b77e27d4b3660d9863a2d736cf97cc8353a889e5ec3f' 
  AND token = '5SSqdrktP/DzRxtpUASN6rzxNk553FoetS37wt1boM0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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