Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca9b888f95f81b4f41b1dc8760cdd810ae171d9f3566a68d4729305fa8dc6fc1' 
  AND token = 'M4dfUPlIyDlaPlZdYiTDp04W0JHleO97862pueHPCXQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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