Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '819969c325e67cec0c119e42903a25c747e8f244425a49a3370bfb672a88a654' 
  AND token = 'a73Fjj3eRUTESLKwRl5FQhxBB030NQslY884+0ui+HM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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