Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5f7cf1b6514bfbce4b8c145ffc69444f18cfa9cf71bf48c50a82724036965fc' 
  AND token = 'n9BlVuhQ5C8alMoTHpbPrWtZOlojsPcxOKqFduinWu8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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