Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e572c615dafe47b2affec8a6d5145264df6ad6effd990d1f9054ce4bedeed9e' 
  AND token = 'HHqiC3hcYebRgyU9x1ni/p2FFMppBy8qgGZKbkdStxw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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