Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26d6abb0085f4af0629c0308028b83ae40ce5d8c4a1f062b94ee1ba014a0647a' 
  AND token = 'Avb4cnmKONx44lmjq9R9lpEF7ZppwAFxK6ln/fwmmMU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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