Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0556ae4c28592eb19c0fba00a8dc3b5a5b6e005241c39119f7e03216dc0c7f4c' 
  AND token = 'fn9NvYrX7l8imYoFJFlaJai4Bv+OLEqAukqInkNYi74=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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