SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa37b75a184486d830a19b3bfd87f96a2db4143c9ec2424f2ef8154a74a81a4e' 
  AND token = 'Qh05KyU+luseEzM9xOZSmKvqrpiYlwDwoN6hiO0OygM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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