Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e056a202132d4bd333a9650f1dff03b01b84df131f2aa0e00ac34079e76a9bc' 
  AND token = 'i6pr5wau9VaPeqQ4UY6bavxn7GE9ggvJ0G6bBStg/C0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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