Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ed0b05364e7dae533292707da8f37ef7a85cdfee4fbb57f4e74b491e96ac1d2' 
  AND token = '+BkuaFDr6QCo49Ll0PiuRLG8wlE9aGavwlJEywNSV+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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