Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dde66992bbd61e5ee44a8c9e7ce7265dcee26bf44d3388ff32103592e85c9b07' 
  AND token = '57nwWivs1cW2juHBXWHVBn7sm7QNh3RkMnxzcWT6E7M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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