Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c810086804d12296a95fba29909f84b84b923a40e8c46c8b75ccb52ccad936e' 
  AND token = 'rdZ5icvDAjSbh/HV6juxaXtDlvqYRJ3S3JD4A/4JJn4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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