Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6943f4fc932ac7b079abebac944910aa60774460b07d9036576bd63cebc4e7f3' 
  AND token = 'sIkaOMZslqo7iwSJSGtMyb+5LndDq2kAsWrjerVA/cg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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