Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9dd44bcecb7ff953803e92bfbfd280720d8107515a6f9448f0bc98065e9a3d4' 
  AND token = 'IysqdzDD3Q6ml9v2BRF4ACVex4xLADOQe7gAYoggl10=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}