Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '873ed2aa0e0d87abd03360f30fa0e37fe6b7b1cc767e59756200ef75a3735710' 
  AND token = '4hGoRysaj6bbtWMcUGXilpg6FSv7cAANJ+2EVqDKfgU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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