SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60d01ecfc6a539a47e14391474506c767ab7cc789cd55662b6218ea669294695' 
  AND token = 'JzeGbVkPNjwUrAweDOAPYwdw/XuiKf/JF1ysjyYYjRI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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