Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc357d1ed43e2db962dc0c527238324da28169d499c7b954873270be59c53e77' 
  AND token = 'cRn8r9lzX7qbaEkGdSuh8e3lc4d5kpVu1Uy42luRSqY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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