Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '43b291d426e235029a09a773c2b8cdab1c1a8f241ccfb01489eeb4149aca7800' 
  AND token = '7PfbHNWEbjlziRmZoN/fF2+uMalDNK5CyJAanfFw5jg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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