Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '779e7ec7cd4e8a8a9a1ea9ec6c8a0a01a8b1f45346aa9fc3fa55e021e42c9f86' 
  AND token = 'sIv56aLwOtGXSeAtWLlZXDR7PaPxSl6aLGNMtwcs4/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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