Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c6d332b3c89e68bad19d6462da569e853160b0bbb2c27ad78100b3c255d2882' 
  AND token = 'eSBQQPRglX3wHcjfC2nmcMI3AAUItUA/ZAf+YYwi3Hw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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