Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37b8c4fdd8e245b67da28df0c419461c916497eb4496d49b3f5d605dceb2cc98' 
  AND token = 'iK8cU9zcOfVh0WBtJm14USmL4VTq3ePIctSlO7hpp64=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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