Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a4462bcb61392f92cc48d6cf231227d94cfb927b11acc405a3eb9786879c04e7' 
  AND token = 'hObALKXZq6jkOrWO99NMI0pPsKUuajB4LM9Tg+LDlno=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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