Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5172eb84ea8fb59e8b800bf52661017483bc8447f5b4fe391ed423c5e40a0c14' 
  AND token = 'rfyQglHxKIwUds9QaVJPYe21jxonMCIezPLVkLX0cnE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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