Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2371ba3b7dcea386f80d48af7f9584d34557aa62ec909b1c29e9a68057c1360' 
  AND token = 'nvt2jaN8eIsNr8ImeoRtDQb91MI8K06TOO1+lkeOXKU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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