Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'effff00591ad892862a0be3596ddae3794a96feea3980ac5cad7ead4f4377e13' 
  AND token = '+ai3X/L3iebpP5oPpHQFY5nwrs/oUoQG0ZIiBzG+ZAQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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