Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ef9eb5d1f44547ecb39f8fccd4f239b4788bb0002f0dd8dad285cbed2d238e9' 
  AND token = '1MVrNiZeoa/JwqT5Rg5LAPFMF18pp2yN21YRcjk5giQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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