Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2f7fe1f8eae5a863f5a5f31887ef98efe753df410a860a8818238eb386fdb63' 
  AND token = '2turFW0XPwNfL1H2aMKsWnlwt3hCOebfTk8ZtYRnVWY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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