Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ea2ec5b40cb69d4c6b24490421401006ff4e10c3e7d939c40575f2d9751e52d' 
  AND token = 'dQljt7HHGe6xwAHf/lPFF1abWgF2DviuYlxLbw/O3X0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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