Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33e96fb9ececaaab283dc27591a7087fdc7fe543a1b99341127b109a2d7dd271' 
  AND token = 'Vvz4CfPbxaFfDs64T/nTcEgf3EiVuqwI8ofPGTi+GII=' 
  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"
    }
  }
}