Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2a79f3f04770bba8d1222354924600bd2bddfe7282d4d50486f673009bf33ed' 
  AND token = 'Bx5RxMgOdNsinDi3ldCxiKYo47qXBzFc5ZoVRhB8e2A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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