Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a6d660caf9209cb34e07895d68b579ea0f302c8f682a5cea96ef5dabb231d95' 
  AND token = 'zj5EPde3DFPRUAD4XIVfNtcCNgVtVFhF5S4OUSGpIII=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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