SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3be614f3b64fc6430da6589fc2cb1027c2c9891c5dbb2a7366e209820d5e215d' 
  AND token = 'Bmwdsqjskt5TmpuDW6QNpd8hIolgw4pD48gGwny3/IM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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