Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84563574ab3d30538ceef0ce3632a97efb5c181a42da078e211c433193de886f' 
  AND token = 'V6KdV4KkzjIfugYDB/4FgVoA8sJ4NKIIXa1yLGCbtYA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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