Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45c72ed1498740df552aa8e88b7ad196a7c8bc345755fd8676bc2576c3b4e565' 
  AND token = '71I9ltX7IBQAtIxBsWcmIhZOELu3IspwcaGiIKd3RtE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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