Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f454ef2748b5229792144268bfb75dcd02893d14becaad3496064f69043d8e5' 
  AND token = 'sJgufPkojjxpj8Dz4TFL1iY1iYRtWYNf13d28JfMZYE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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