Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2aaa5c3eb6e3c378969d61583b0c1e60327973f6c60bb2f7f44e33f833259a4' 
  AND token = '78CP7KY3qgsdltKClPA8nmGB91QKE3lE0UqWdYx6KpU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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