Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '190c26d7ef275bec6da1918a336e83f214a4178e96ac4c9ace011a2108187ac2' 
  AND token = 'buZIoxR1xaqpHHnZ5IJmhAYzADg+OthDgqoOvyyu5gM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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