Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b6ceac1ca12c356fe1702bd78bb4bcd3ac425575743f2ac7f1e9ea8d4b130e2' 
  AND token = 'L2bdfKgySZAjpNTiTbZWf/DmKjiQGXCjV9meFPypfyE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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