Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd35ef6076490ca5779db85aa0750b472b44e5291f04da745b0c47506204d730c' 
  AND token = 'gA3wigOyqq+UMr8fs9wWV1NR0p7pwVeqzgM9nuuWkz0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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