Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c084f4821e6030ef07f613ca8cb13cfd5115192969682e36c7f99e56ffa26c6' 
  AND token = 'jq3946xjMdmtd+PR2vo1mIrENwj/2qSFak8pIae/aDM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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