Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '541f4238889c08d31b999ea7a949cf34066d0ee8174391dad5d3d2388bfadb07' 
  AND token = 'mwZ2UANuIy5uMMsUWsSpEpB2gmQb1UEs591BzzlNu38=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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