Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d8e3b2af694d9ebaf1175b066df4042437abb5833e95a85d30092d00e796152' 
  AND token = 'V4+sxSozI/o5und7QDrDT1y/mukGpYNxtzmMjUvneOo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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