Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7db0e8b5d2dcfc62048e6001474d2a1f089a357391f53afc1a3a93999a2e1178' 
  AND token = '+bPq91btm/zQ2Pp5JYN8gxBUiNvlNhe68HaO5O276k8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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