Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0efdef8ec5b72d132ba1374f3818bfd02ae7cec2e37209b6464f6014f556e3cc' 
  AND token = 'xCzxo3TU8ib+1TtqAfbu4SeGvpQhxOnyxhjqIiMNlIk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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