Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9f4e867028bd6aa56acf12c409d6bf7259ace779ed2dc7f22090db0ff52cff2' 
  AND token = 'n9bGM6I8HWDu6zRvdq3Rt3e3t3ZOQTok/9CmdZix5Ao=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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