Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5c27653ba061085c8bb0d7615d208fd1cc352320b40512be542ee8a212c87bd4' 
  AND token = '4cGkqgZEJjJg3WrB6qcOlfm2YI1aAqxp7g82hHvYSaA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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