Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '957f392514be825de43bc1b3ecd9cad30c8c66c054b65baf53bad7c481310960' 
  AND token = 'ELdK+S4VsQGZpUCXv6CoqqNCE32wDKkM1gMEXCC44LM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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