Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbd3f67e3dfcdeb823bef2794aea6b55da954be1397d0983adee374e824b1945' 
  AND token = 'q8rXac5ExzfJzNujFEAbgcPjqenNlnNWpjF4Dr7G7a8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}