Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '559e21994a6cc3f3a402e495a7e770604dbfc56a9f96fa50cbca37bc50a1a71c' 
  AND token = '/D1to6Hwu4sVy4edi/LnJ3KwyjabLiuDjHAhbc+7woY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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