Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ed0cb0c341ef924a8e7d3679cae22f189c20eea0f623a0862708dd3dc1416b9' 
  AND token = '8GKdsJu/VK4fRpLJ86wPvMLkMNEl8eyMKoPXfgMOyJM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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