Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '79329e95b02e73b8e5ccc572b0d527614da8b6f5c649c72277452d47e4a0aeeb' 
  AND token = 'b2IJP5VuOPyy1oYDQ0I/SQllI9TcSuTwNpZdfJ9Pesk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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