Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3a2dc0052e4fe0fb9d79231843b90be9403a253303e66ff74fbec88bd5fcd58d' 
  AND token = 'NG9xSG1oxEmtBYZnX2BP7SXUVbBjV+G/ratla4+1yfM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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