Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e207b4ad3f2c0f663df4415cb9c8f7b515550c7f3126c4bb27c297a203bb688' 
  AND token = 'ibpcfb74xgAFAy0/c2eOJZUOcmglWeUpXwzk5JydJpc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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