Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aaf6ddc9196737d2a9ee70c5e9827f1badd8406176d1f36431dc196c664f9ebc' 
  AND token = 'Qj/J9E2i4zdIGSQCa0QWz45+gY2JHc/vUJDiarrQhXo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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