Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '64445f80e9c334ce109c5cadc9fa9c0d69ffeff099513f9fe609136b47a55f86' 
  AND token = 'sBCFlVjy3ZawT5OE/vuWOJkm2Z1e1EwlqEos/fGLdRQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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