Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3076bdf4f65d4ff815a40131b7b5e5397747d8056275c0d8305bf76209c283c3' 
  AND token = 'QTQxw10wZClFZBc2qSYNRaYG7sySupr80p4GRpSo7G0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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