Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bfbb4721fc1112d6965e53344c2b65f369962baa846a47c8e31c4ea60a3707eb' 
  AND token = '5ZtshrWyWNFYDEYRthmsyVazQQk/LU4GLQsZ8a42PMA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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