Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '161ccaa032074f4a4304fbb6dc064ea0663bca249f5be9d40cb8ce162e9fedca' 
  AND token = 'bmlblIj6TJgEo+yoNwS7KYmpkdXZ3WOKH4Qr12Jzp7M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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