Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '578c4a978e3e7e6ad627fb22bf10eb6cb67d2df980c4b386bc33d562b6f92e49' 
  AND token = 'Qn6DbpjrfUgN/Oc0BXk3N/J4Ll9YilXcuu8e8r7Oego=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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