Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32b0dcbffd34ea3c3caa40b15f17211270ba6c09ab58a6f9d11f777d8aee2a60' 
  AND token = 'WULbai7ZIPLx0bADlFf8s9TR5JwBYa27NXDl2m2c258=' 
  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"
    }
  }
}