Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d7e4b6af07428f51efc26ef2fa8be8c5329454483d9542d022a5bf31ae40e0b' 
  AND token = 'O1xWaSWiJd9xYHTAOxE4lA7UnLZydiGJoemNXOMsrHU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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