Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13b21fb2a3d64241ae422a130ca63f43320d8da9611f3bc9e062fa6412a3bc9b' 
  AND token = 'r1QloIuAfYY+LPHXgulAC3VJ3h9hlZmWvUOOZ4dksJw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}