Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9536534396a139a3c4d36b508c26e3e425e70bd829484cfcd335044a537cfacf' 
  AND token = 'M5jXPXy5h/hTb1OeZIyU+XNjNmKDGOjW5l3Q4P2/2p0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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