Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca768b521e56b18af4409e4897df03a9ae862569e1465d976d514f6d794a6ebd' 
  AND token = 'RUNNEVflBBIzbgk6EDyoLhUq3rFM7CaR7wCs/UsZxc4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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