Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ec192641dbaf1d9f1f8717040f98b76635bda993ef497de7b37367c739b3ad5' 
  AND token = 'ch/sHqqlSnDnJkm4EtGb7xhh90CaQNBMB+yjYaxMVTw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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