Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '66f49f98302215d2c45a9fe16c57a5beccd1048086bb93c0e92f0234dbed2d60' 
  AND token = 'mdRLUBL49Wrwov2p/F28dLSbGQTzpZl9fUvOrVPa8Z0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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