Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e6eb009acfaf08dbbe71f5601fe0e04f8f748d14fd7f3f9b81df9906815d40a' 
  AND token = 'cW6NqDWdcxUVZtV5JvGd81IOLKHU1GBj9FI0n5fOTkA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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