Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6736ddebef3f8383f01546edadc568345bb3ee5de8acfc9ea905295009cab27e' 
  AND token = 'XpP4DhK7RrrUSMBt3RIAqqsb32dMr1rnytWZyayA6cs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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