Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = 'aeef8b98ace946059198c268f56adfa9400de101d66139116757ecc502827863' 
  AND token = 'dEMlJQsVXl3fflOUtwB/5O+TLCRmdROJ/1sZiDzj/z0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00754

JSON explain

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