Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bf273256cc81989ef9ef6e9b3b49f72c2f8d88dcd82e5d39bb0e407551bafd3' 
  AND token = 'b/MQzHXxCy10Wf51rx45/ht0gXZEXnZAmz4mlWMLftA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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