Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ade83744ca18817da8f6fc5e4752b718bd8e845408ef1f685bab29c8588f9ac' 
  AND token = 'oTopFqsQOLrSqY0eOyrHHOI3n9OsSMgnf130VUpmOoA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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