Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '036b59a93e58cc03745f96b41ec74af80bd09a7ab4d2e1f72227c280e82f83b6' 
  AND token = 'TO/UigiLk8u2vT6Sx5jSdO0xo3S6Il9WfucY2Jtmsxs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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