Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ca87d404e8954bd377352e3ef5778763dada835ceec6c300888bcc6dca67e0e' 
  AND token = 'ke7iW9N1s+mptz+kJUimWDr2LY3h/rQcLPVaxVkEwtI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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