Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '279bc24da8b32b25ccab4e320e9e0c4cd7a38d007304a60ce8b90dd7608dceff' 
  AND token = 'taQOqUmX/gy2Y6cwsx1JojOvGorqRutcpLZ/dTJr698=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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