Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '9d712f5916ecfad10f4a0f7892c1f2a11ba9b53cf291e6fa83ff3daa4622452d' 
  AND token = 'IZ2L+2kvW+cU+sJAK0b3yeSYp3yeYzUIklCUl1dMqMs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00767

JSON explain

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