Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d924bd5539d3b023492b498caa6a7ed2e649d2b83db4ccb251497c4795d5d78' 
  AND token = 'kEbepd+UI9lIrJoDWdaexNyVUmTdtBcNy61eB3yOm3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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