Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6feca297a93f70845007c69192a6f362b587e65e4ade80f2f1028cd4a838d8f0' 
  AND token = '4we4RXQcfGEUdeScRdP4jfX207DBj1xalzZzGklrcN4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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