Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '636d976474794b4e8245b954bef505416d559e1d418290a409ea3803375972ef' 
  AND token = '33Dg2HmgkKr0Op4m5YOGmpuUjC7M0AvvRl/3+4CaEbM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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