Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14a6a367d20608a083277f8d36c2c401950b2db99529c34602160a77c550db8d' 
  AND token = 'QDEQdjVyiNW3iIlRrJcNj0wUKwxxbTgIP8Pd68uhiNQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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