SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4a4a3cee2497019af68690c29234c7c0b8cff8f996a277e652b9f0ad1b5e3956' 
  AND token = 'GhVKc7qs66w7FqyG1J5+dixhJ6rsJRanpr+vTwbUu/k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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