Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '610ebf81b91ea59e7bec1e259106acf1e4e726e956f30ad4187d3ac4d136c980' 
  AND token = 'dHlvilvD1Er1+8mvXLaqxGvcSoX/VRvpeLiCdsD0pXE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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