Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '18ed77805003a3ee0cdabe87bb69d8fd1de4426f2c052ed7dd420fbcd0c245cc' 
  AND token = 'wVxEvsGGvcU6NF8u4tu5BiEcIewXYzU4y/oxS85p6Zw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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