Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b646aed4845bb3c096fd52685236151038347b565243d4cfca9b60b008a98eff' 
  AND token = '/So6ojytpIhuzhWrdIssoZc9JqMqZ9doV2NgnN9BGic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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