Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '849f12cff77042aa194517f0423d2a4053b17857b283ad38d214a2978204ebcc' 
  AND token = 'H1R7V2Oha6R1Yi/FZkx9lMWe3XFz67KseStrvpe+lRw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00069

JSON explain

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