Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd888798ab50715e54a85a7b47e33366b363ca3c88e2968eb5f345285447bec68' 
  AND token = 'WwG8iqnsc9vP/xk4cE0ZQT/f/1az7hDW13MsW8n0Pak=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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