Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b93f99d85ac939cba23dd6456e35cd4323c7d8fd7c6933a07262b27bd511849' 
  AND token = 'dNhtKdfvBA+GzPxrD0b+bhSSw90a0rAploMZH4Pp3fQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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