Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6308a2ce4454be45564d2944e79115a2bb32de55ea85f5be7aaf497ad971eef' 
  AND token = 'tKkeL6psDH0Ag3gYjmy+4QHc+vf96V4vSYajNn2d8jA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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