Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '078ac98c2032537d10b1a07da51dde857e95a42a2362b3a0187c6af3aa9f2556' 
  AND token = '6Fep4TLvAwMpucdsw2U83aT0UDpPnA0xlOdBivj/Ifc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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