SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '04872aa9c9a1e47f622469b2103c757c5182493ddac79fd3880bd4b92370ff32' 
  AND token = 'Bdhi4U/PSK68KF3as3AodyBvwGm+9OLJJypbGh0vKXU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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