Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4773d87d50448e31d29af072e6b6f84f80ba8906affff8ed68e3881a7cad6e64' 
  AND token = 'aG1DSQYEA92mCoCngZejmC8kG4aE/N4gFIRfCzis/jw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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