Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b9e58e86de52a4e34113f262584d037a53abcbaf8ba0a91889e7734ae0133aff' 
  AND token = 'ei917TX/6SYvBIa3Q2eCYoAUe5zo4MwO/M6BJ+Z4rRM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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