Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b79a01b0e7557039a888d7c9a5979933c45a40b721dfde0bcd16545804421ee' 
  AND token = 'S7uT414pJYxX7oNtt2mlHCo8NfkRQU0y2eM78tOiHP0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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