Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '836165a57237ac219a26c0b1ae316c175bc5f4620fab5e4667ebea7aaae9a504' 
  AND token = 'MqmVngrERvRQXxxyKUvR2MQl3rii/HFQkI+6+Hop7nE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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