Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14a155a7c971846872ed53c7e1eaad6ecb2eaeb34870fd61335a6aaf140632f7' 
  AND token = 'CYoJfek/u0mB52YNYfZAJNYnmfE3zCLuvCN/YhKHtI8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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