Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dde734009cbc9333b3fb644c5581d28c5dc33825c163a3cfcf331c7319d782b9' 
  AND token = 'X8xW3WMmd+XyGWi3BJi3Pjb8H88J1KIWarcAWHlVdVw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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