Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59df828c98cc24ee0e8305bf1a961be73e02f7f1f5c34d41f1adfae2ac326322' 
  AND token = 'sxsTWSvhDq8DYhXsF5zFPQIYkDCVqw28geLRc1pxcK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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